<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>随即轮播图</title>
</head>
<style>
    * {
        box-sizing: border-box;
    }

    .slider {
        width: 560px;
        height: 400px;
        overflow: hidden;
    }

    .slider-wrapper {
        width: 100%;
        height: 320px;
    }

    .slider-wrapper img {
        width: 100%;
        height: 100%;
        display: block;
    }

    .slider-footer {
        height: 80px;
        background-color: rgb(100, 67, 68);
        padding: 12px 12px 0 12px;
        position: relative;
    }

    .slider-footer .toggle {
        position: absolute;
        right: 0;
        top: 12px;
        display: flex;
    }

    .slider-footer .toggle button {
        margin-right: 12px;
        width: 28px;
        height: 28px;
        appearance: none;
        border: none;
        background: rgba(255, 255, 255, 0.1);
        color: #fff;
        border-radius: 4px;
        cursor: pointer;
    }

    .slider-footer .toggle button:hover {
        background: rgba(255, 255, 255, 0.2);
    }

    .slider-footer p {
        margin: 0;
        color: #fff;
        font-size: 18px;
        margin-bottom: 10px;
    }

    .slider-indicator {
        margin: 0;
        padding: 0;
        list-style: none;
        display: flex;
        align-items: center;
    }

    .slider-indicator li {
        width: 8px;
        height: 8px;
        margin: 4px;
        border-radius: 50%;
        background: #fff;
        opacity: 0.4;
        cursor: pointer;
    }

    .slider-indicator li.active {
        width: 12px;
        height: 12px;
        opacity: 1;
    }
</style>
<body>
<div class="slider">
    <div class="slider-wrapper">
        <img src="./JS案例需要的素材/luya_1.png" alt=""/>
    </div>
    <div class="slider-footer" id="slider-footer">
        <p>对人类来说会不会太超前了？</p>
        <ul class="slider-indicator">
            <li></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
        </ul>
        <div class="toggle">
            <button class="prev">&lt;</button>
            <button class="next">&gt;</button>
        </div>
    </div>
</div>
</body>
<script>
    /*准备数据*/
    var arr=[
        {url:'./JS案例需要的素材/luya_1.png',title:'夕阳抛竿，水花轻溅' ,color: 'rgb(100, 67, 68)'},
        {url:'./JS案例需要的素材/luya_2.png',title:'溪流蹲钓，专注凝神' ,color: 'rgb(43, 35, 26)'},
        {url:'./JS案例需要的素材/luya_3.png',title:'巨物出水，握竿发力' ,color: 'rgb(36, 31, 33)'},
        {url:'./JS案例需要的素材/luya_4.png',title:'雨中路亚，蓑衣映光' ,color: 'rgb(139, 98, 66)'},
        {url:'./JS案例需要的素材/luya_5.png',title:'船钓收线，风拂衣摆' ,color: 'rgb(139, 98, 66)'}
    ]

    /*产生随机数*/
    var random=Math.floor(Math.random()*arr.length);
    /*获取图片对象*/
    var elementsByTagName = document.getElementsByTagName("img");
    /*更换路径*/
    elementsByTagName[0].src=`./JS案例需要的素材/luya_${random+1}.png`;//random生成0-4的随机数，但是图片没有0，所以要加1


    /*获取文本对象*/
    var elementsByTagName1 = document.getElementsByTagName("p");
    elementsByTagName1[0].innerHTML=arr[random].title;

    /*更换背景颜色*/
    var elementById = document.getElementById("slider-footer");
    elementById.style.backgroundColor=arr[random].color;

    /*获取小圆点*/
    var elementById1 = document.querySelector(`.slider-indicator li:nth-child(${random+1})`)
    elementById1.classList.add("active")

</script>
</html>